(19)
(11) EP 1 804 359 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.12.2010 Bulletin 2010/49

(43) Date of publication A2:
04.07.2007 Bulletin 2007/27

(21) Application number: 06026931.3

(22) Date of filing: 27.12.2006
(51) International Patent Classification (IPC): 
H02H 7/08(2006.01)
 H02H 6/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 28.12.2005 JP 2005377861

(71) Applicant: JTEKT Corporation
Osaka-shi Osaka 542-8502 (JP)

(72) Inventor:
  • Yukitake, Yasuhiro, c/o JTEKT Corporation
    Osaka-shi, Osaka 542-8502 (JP)

(74) Representative: TER MEER - STEINMEISTER & PARTNER GbR 
Artur-Ladebeck-Strasse 51
33617 Bielefeld
33617 Bielefeld (DE)

   


(54) Motor control apparatus and motor control method


(57) To provide a motor control apparatus, including a rotational number detecting means for detecting the rotational number of a motor; a current detecting means for detecting a motor current; a voltage detecting means for detecting an impressed voltage to be supplied to a motor; a temperature estimating means for obtaining a motor temperature from the rotational number of motor, the motor current, and the impressed voltage; and a protection signal generatingmeans for generating an operational signal in order to protect the motor when the obtained motor temperature exceeds a predetermined value.







Search report